课程名称： 电子技术课程设计
高温轴承shgbzc院 部： 电气与信息工程学院
专业班级： 自动化12101班
学生姓名： 占 文 兵
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完成时间： 2014年6月10号
报告成绩：
摘 要
延时开关电路是电力控制系统中的重要组成部分。它由延时电路、时钟信号产生电路、声控电路、延时显示电路、直流稳压电路单元电路构成。延时电路的功能是先输出高电平在不用人干预下过几分钟后自动变为低电平；时钟信号产生电路是由NE555定时器组成的多谐振荡器产生计数器所需的时钟信号；声控电路是用压电陶瓷片拾取声音信号并把声音信号变为电信号；延时显示电路是通过74LS47进行译码并驱动数码管显示；整流稳压电路采用LM7805把交流电变成稳定的5V直流电。借助Multisim10.0仿真软件对各电路进行了性能与功能仿真，通过仿真分析验证了设计的正确性，达到了设计的预期目的。 关键词 延时开关；声控；74LS47；多谐振荡器；LED
Abstract
板式换热器选型The time delay switch circuit is an important part of the electric control systems. It is composed of delay circuit, clock signal generation circuit, voice circuit, delay display circuit and DC voltage stabilizing circuit. The delay circuit's function is to output high level and then covert it to low level current automatically after few minutes; the clock signal generating circuit is needed when multivibrator which is磁疗鞋 composed of NE555 timer generates clock signal for counter. Voice止血带压力 control circuit works as piezoelectric ceramic piece collect voice signal and 圆弧齿同步带turn it into electric signal; Delay circuit 剪力墙加固decodes message via 74LS47 and drives nixie tube work. Rectifying and voltage stabilizing circuit adopts LM7805 AC into 5V DC stable. With the aid of the Multisim10.0 simulation software performance and functional simulation of the circuit, the simulation results validate the correctness of the design, to achieve the desired purpose design.
